如何为Magento中的产品设置自定义价格，仅为添加到购物车中的第一个产品？

Question

I trying to allow users to get the first product sample they add to their cart for free, but any samples they add after (including the one they already added) should be normal price. Right now I using setOriginalCustomPrice in a module, but the customer can change the quantity, and the price stays at zero instead of going up. Anyone know how to go about this?

Answer 1

You can achieve this by a simple calculation where you are using setOriginalCustomPrice.Currently I think you are setting price 0.Instead of doing this,use following logic to set custom price.

 $customPrice=$qtyincart*$productPrice-$productPrice.

So if user add 1 qty then $customPrice will be 0 else will equal to sum of qty-1.

I hope this solve your purpose.